Depends on which model and brand of jet engine you are asking about. There have been many jet engines designed and built by many different companies over the years.
Well, there are many reasons but the main one is the jet engine is many times larger and more powerful.
jet engine
A jet is a type of engine that powers many aircraft and does not have anything to do with airplane size.
The Thunder Jet was the standard engine in the Cobra. There were 7,675 Cobras made in 1970. I cannot find a breakdown on how man came with the standard Thunder Jet engine and how many came with the Cobra Jet & Super Cobra Jet engines.
Frank Whittle was the invetor of the jet engine.
You can but a mini jet engine on ebay.
I would estimate 21- 25 countries can and do produce jet engines
The Germans invented the first operational jet engine during WW2.
jet metel
The combustion of the jet fuel in the engine of a jet aircraft propells the craft forward when it exits the nozzles of the jet engine(s) at high speed.
Gloucester is where the first jet engine was developed .